Malicious PDF — malware analysis report

Static analysis result for SHA-256 470d427c0571568c…

MALICIOUS

PDF

86.2 KB Created: 2021-07-15 14:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e216db524b23f8152511fa9db36ce3a5 SHA-1: 9fb5a5e911e78692d65ba2fe599c258e2f6e19d5 SHA-256: 470d427c0571568c940acf6c9ad44087df507f64e0a1ac39cfe74efd215eab47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to websites that appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function of this PDF is to act as a link farm, likely to facilitate phishing attacks or distribute further malware by directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/5fqn78672aomn2nga7s8ou4sf3/detenigudogoluvuwujego.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/d9edc1e778acfbd0e9ddd61c8720f123/lirotujefeketizixadilisi.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c0cb7638d---puwep.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/65876710231.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/5oqq7uusg134ngn28mfdi4os5f/musete.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5acf4c6e0f---dobizetakuxodivunuwawibe.pdfIn PDF document text
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/marin.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086386e0a4ae---82559467213.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/tetugofogat.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/sri4h1of68o53ke2f83c1t4oru/lagazuxuwa.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a7a8e7924---xesetufodezoxak.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/35f3a4a6d8e8d2728743840d48e67036/74490803312.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/46784124656.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/duzotumosonigefuveruzade.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/97022670643.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6cf713f2---32936401143.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/t37n656po5u5hhab6gtbd0e7ch/fiviraz.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3525b289d---39510371737.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c5ddb9141---kupixikebufitogibin.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a16f51dfa---wujonufotelonexib.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/8858fa1f01af27813d82e33095eea8cc/tibitivulesax.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/25dilvt4v6j7nfkilrsgclcqe0/91965691111.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a449ca1da4b---teguborafevipidefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=can+you+trim+acrylic+nails+at+homePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 10740 bytes
SHA-256: 8a8f71306cc9ca6c0433bb644e7c1394120a652471939ef90c53281ab4cf6655
font_01_sfnt_off00010767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10767 16884 bytes
SHA-256: e214c76753e7c063d8c674d786cf67d1d1470a40a67fe0e5bcc1a1c1c1d93c0f
font_02_sfnt_off00013341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13341 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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